Rivet-removing tool



Dec. 31, 1929. B, LYNCH ET AL 1,742,040

RIVET REMOVING TOOL Fild March 21, 1929 9' .2, l 11 Z g Z 19 20 1 l 4, 7 l l1 I Geo B.L nah, y dlen .CarroZLand 126i? Gum ATTORNEY.

Patented Dec. 31, 1929 i UNITED sir vrlzs PATENT o F-ICE GEORGE 1B. LYNCH, GLEN L. CARROLL, AND ABBIE GUMM OF TUCSON, ARIZONA.

BiVET-BEMOVING moon Application filed March 21, 1929. Serial No. 348,940.

inafter set forth, a tool for the purpose referred to capable when used for expeditiously removing or extracting broken or twisted oif stud bolts from their seats.

A further object of the invention is to provide, in a manner as hereinafter set forth, 'a tool for the purpose referred to including an intermittently rotatable element for quickly removing or extracting broken or twisted 01f stud bolts from their seats when occasion re uires. a further ob ect of the 1nvent1on is to pro vide, in amanner as hereinafter set forth, a

tool for the purpose referred to including a rotatable extractorelement and a spring controlled driven element acting upon the extracting element to provide for the intermittent rotation of the latter to expeditiously extract or remove a broken or twisted off stud from its .seat when occasion requires.

Further objects of the invention are to provide, in a manner as hereinafter set forth, a

tool for the purpose referred to which is simple in its construction and arrangement,

strong, durable, conveniently-operated, expeditiously performing its function, thoroughly efficient in its use, readily assembled and comparatively inexpensive to manufacture.

With the foregoing and'other objects in view the invention consists of the novel con struction, combination and arran ement of parts as hereinafter more speci cally described, and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.-

In the drawings wherein like refer ence characters denote corresponding part throughout the several views:

Figure 1 is aside elevation of a stud extracting tool in accordance with this inventi'on.

Figure 2 is a longitudinal sectional view thereof.

t Figure 3 is a section on line 33 Figure 1.

Figure 4 is a section on line H of Figure 1.

Figure 5 is a view looking towards the inner end of the extractor element.

Figure 6 is a view looking towards the inner end of the spring controlled driven element.

A tool for the purpose set forth'and in accordance with this invention, includes an extractor element and a reciprocatory spring controlled driven element referred to generally at 1, 2 respectively, and with said elements having coacting interengaging means, to be presently referred to to provide for the intermittent rotation of the extractor .element, in an anti-clockwise direction on the movement of the driven element toward the extractor element or the purpose of extracting or removing 'a broken or twisted off stud bolt from its seat.

The extractorelement 1 includes, a barrel 3 of any suitable cross section, preferably cylindrical and which constitutes a bit holder. The element 1 further includes a bit 4 of any suitable size or type and of a form provided with a peripherally threaded, cylindrical shank 5 for extension into a socket 5 provided at the outer end of the barrel 3. The wall of the socket 6 is threaded for engagement by the threads of the shank 5 to detachably secure the bit to the barrel. The shank 5 is of reduced diameter' with respect to that part 7 of the bit 4 from which the shank 5 extends whereby a shoulder 8 is formed which abuts against the outer end of the barrel 3 when the bit it secured to the latter. I I

The barrel 3 has formed integral with its inner end a circular row of spaced, substantially triangular shaped teeth 9 of substan tial length. The teeth 9 extend lengthwise with respect to the barrel 3 and are flush with the outer periphery of the latter. Each tooth has astraight side 10, an inclined side referred to. (The inner end substantially trian 11 and a flat outer or free end 12. The row of teeth 9 provide the inner end of the barrel with a recess 13. The barrel 3 is further fomed with an axially disposed socket 14' barrel 3 an extending in thesocket 14 is a guide screw 15 for a purpose to be presently a of the screw 15 is reduced as at '16."

The-reciprocatory element- 2 consists of a Icylindricalpart;17, inergin sat its outer end into a ta redpart 18 whic terminates in a polygona ,part j1'9. and the latter merges into a tapered shank 20. Projecting from the inner end .of th'e part 17 is a circular row of ar shaped, spaced teeth 21 and-each mclu es a straight side 22, an

v inclined side 23, and a flat outer or free end 24.

The teeth 21 are oppositely disposed with respect to the teeth 9. The teeth 21 operate in the spaces between the teeth 9 and these latter operate in thespaces between the teeth 21. The inclined sides of the teeth 9 are engaged by the inclined sides of the'teeth 21, when. the element 2. moves towards'element 1 to rovide for the rotation of the latter to the aft.-

The section 2 is furthermore provided in the parts 17, 18 and 19 with an axially disposed socket which opens into a recess 26 provided by the teeth 21. Sweated in the socket 25 projecting from part 17 and exthrough the recesses 26, 13 and into soc et 14 is a guide stem 27 formed in its periphery with an arcuate groove 28 into which extends the reduced portion 16 of the guide and retaining screw 15.

Mounted in the socket 14 'and interposed between the outer end of the stem 27 and spaced from the socket 14 is a coiled spring 29 acting normally maintain the teeth on element 2 in spaced relation with respect to the teeth on section 1. The movement of element 2 towards element 1 is had against the action of ring 29.

The section 2 is termed the head of the tool and the partlil19hthelreof is rovideg for connectingto e ea ano 'nary ex' nal ratchet wrench. The head is 4 go tivelytothewrenchsothatthesh 20Will extend above the wrench to receive driving blows from a hammer or other tool to 'force the section 2 towards the section 1 against the action of the spring 29.

Apropersiaed'bitissecuredtobarrelii and is slightlydriven into aconcavity. or recase which has been drilled in the broken bolt. Therwl'elith handle is held in such a manner as to prevent the head of the tool from turning to the right or clockwise. Force is then applied to thesection 2 by the use of a hamand pro mer. As such force drives the section 2 to wards element 1, the teeth 9 to 21 ride against each other, forcing the barrel and bit of the both as to size andrt pe ma be used in connection with the too Spi ed bits could be usedfor removing broken studs that were loose fittin but inaccessible. Extension rod or rods cou d be used to ermit the tool to be empllo ed in places whic are hard to reach wit c isels or ordinary tools.

It is thought the many advantages of a tool in accordance with this invention and for thegiurpose set forth can be readil understoo and although the preferred em odiment of the invention is as illustrated and described, yet it is to be {understood that changes in the details of construction can be had which fall within the scope of the mvention as claimed.

What we claim is a 1. A rivet removing tool comprising an extractor element for connection with a stud or rivet to remove the ,latter, a reel rocatory driven element exten into an' slidably and rotatably connected to said extractor element and having a portion projecting from the latter, a spring within the extractor element for normally rewing the dr ven ele ment outwardly wit respect to said other element, said elements having normally spaced, opposed, coacting means of such size rtion as to sustain a-violent mpact to provide for the intermittent shifting of the extracting element in an anti-clock-wise direction when the driven element moves towards the extractor element on the successive application of force to the driven ele- E rivet removing tool comprising an extractor element for connection with a stud or rivet to remove the latter and provided lawith a socket extending lengthwise thereof,

a reciprocatory driven element with a stem extending into said soc m s to said extractor'element, a spring within said socket for normally pressing the driven element outwardl with resplect to said other element, and sai elements aving normally spaced, opposed, coacting means of such size and pro rtion as to sustain a violent impact to provide for the intermittent shifting of the extractor element when the driven element moves element on rovided hot, said slidably androtatably connected I the successive application of force to the driven element to cause the lnterengagement of said coacting means against the action of said spring, said coacting means surroundprojecting from said extractor element a spring mounted in said socket and bearing against the free end of said stem to normally press said driven element outwardly with respect to said extractor element, and said elements having normally spaced, opposed, coacting means of such size and proportion as to sustain a violent impact to provide for the intermittent shifting of the extractor element when the driven element moves towards'the extractor element on the successive applica- ,tion of force to the driven element to cause the interengage'lnent of said coacting means against the action of said spring.

4. A rivet removing tool comprising an extractor element for connection with a stud or rivet to remove the latter and provided with a socket extendin lengthwise thereof, a reciprocatory driven e ement provided with ment and bearing against the driven element for pressing the latter normally outwardly with respect to the extractorelement, and said elements having normally spaced, opposed, coacting meanseof such size and proportion as to sustain a violent impact to provide for the intermittent shifting of the extractor element when the driven. element moves towards the extractor element on the successive outward application of force to the driven element to cause the interengagement of said coacting means against the action of said spring,'sa1d coacting means consisting of two circular rows of triangular shaped teeth, one row carried by the extractor element and the other by the driven element, the teethcarried by the driven atement being oppositely disposed with respect to'the teet carried by the extractor element.

In testimony whereof, we afix our signatures hereto.

' GEORGE B. LYNCH.

GLEN L. CARROLL. ABBIE GUMM.

a stem extending into said socket, said stem slidably and rotatably connected to said extractor element, said driven element project-,

ing from said extractor element, a spring mounted in said socket and bearin against the free end of said stem for norma 1y pressing said driven element outwardly with respect to said extractor element, and said elements having normally spaced, opposed, coacting means of such size and proportion as to sustain a violent impact to provide for the intermittent shifting of the extractor element when the driven element moves towards the extractor element on the successive application of force to the driven element to cause the interengagement of said coacting means against the action of said spring, and the said coactin means consisting of two circular rows 0 triangular shaped teeth, one row carried b the extractor element and the other by t e driven element, the teeth carried by the driven element being oppositely disposed with respect to the teeth carried by the extractor element.

5. A rivet removing tool comprising an ex tractor element for connection with a stud or rivet to remove the latter and provided with a socket extending lengthwise thereof,

a reciprocatory driven element extending into saidsocket and slidably and rotatably con- 7 nected to said extractor element, said driven 

